The invention provides an insertion-mounting-type double-way buffer overflow valve. The valve comprises a valve body, a main valve core, a valve sleeve, a shuttle valve assembly and a pressure adjustment mechanism. The valve body is provided with an oil port A, an oil port B and an oil port T; the main valve core is connected into the valve body and provided with a first gap channel which is communicated with the oil port B and a second gap channel which is communicated with the oil port A; the valve sleeve is connected with the valve body, the valve sleeve and the main valve core form a firstcontrol cavity and a second control cavity, a first elastic part is arranged between the main valve core and the valve sleeve, the first control cavity is communicated with the first gap channel, andthe second control cavity is communicated with the second gap channel; a pilot control assembly is arranged in a mounting cavity of the valve sleeve; the shuttle valve assembly is arranged in the valve sleeve and provided with a first oil inlet, a second oil inlet and an oil outlet, the first oil inlet is communicated with the first control cavity through a first flow channel in the valve sleeve,the second oil inlet is communicated with the second control cavity, and the oil outlet is communicated with an oil inlet of the pilot control assembly; the pressure adjustment mechanism can change the set pressure of the pilot control assembly. The insertion-mounting-type double-way buffer overflow valve is simpler and more compact in structure, more convenient to process and lower in cost.